Eight hundred kilometers south of Dark Nether City, there was a valley.
The ground of the valley was dark red. It was not the color of blood, but the color of the high temperature.
The air was filled with a pungent smell. It was the smell of sulfur, and there were also traces of heat. Ordinary people could not get close to this place at all. They would either die from poisoning or dehydration.
Foundation Establishment cultivators did not dare to get close either. They would also die.
Only those whose cultivation had reached the Transcendent Realm could get close to this place.
This was the location of the Earth Fire Cave.
And the Earth Fire Cave happened to be controlled by the Ancient Profound Society.
The Ancient Profound Society's businesses covered the entire Dark Nether Territory. Naturally, there were alchemists and artifact refiners inside. This Earth Fire Cave was one of the artifact refiners of the Ancient Profound Society.
"Young Master Chen, the Earth Fire Cave is up ahead." A deacon of the Ancient Profound Association led the way and pointed at a cave entrance that was flickering with red light. Blazing high temperature was constantly spreading out from the cave entrance, like the mouth of a fire beast that was opening, as if it wanted to burn everything.
The deacon of the Ancient Profound Society did not know why Chen Zong had come here.
After all, the Earth Fire Cave was the place where the artifact refiners of the Ancient Profound Society refined artifacts. The temperature was extremely hot and filled with fire poison. Even those Saint Realm artifact refiners were not willing to stay for long.
After staying in the Earth Fire Cave for a few months, they had to leave and recuperate for a month or two. After the effects of the fire poison disappeared, they could enter again.
A Half-Saint could only stay in there for a few days at most.
He did not understand at all what the other party wanted to do.
However, the Ancient Profound Society also intended to befriend the other party. After all, he was a genius with extremely high potential. Therefore, he had to obey the order.
On the contrary, after bringing the other party into the Earth Fire Cave, there was nothing for him to do.
Chen Zong followed the deacon of the Ancient Profound Society into the Earth Fire Cave and immediately felt the temperature rising. The red light also became more and more dazzling, as if there was an extremely intense flame burning in front of him, as if it wanted to burn him to ashes.
However, this level of high temperature was nothing to him because he had the Purple Cloud Black Star Flame to protect his body.
Although the Purple Cloud Black Star Flame did not have much of an effect on his current strength, it was still pretty good at resisting high temperatures.
Chen Zong could also feel that the fire poison that permeated the Earthly Fire Cavern was purified by the power of the Purple Cloud Black Star Flame when it entered his body. It was unable to cause any harm to his body.
In other words, Chen Zong could stay here for as long as he wanted.
"Young Master Chen, you must be careful not to enter the deepest part of the Earth Fire Cavern. The temperature of the Earth Fire Lake is extremely terrifying and dangerous." The deacon warned solemnly.
"Okay." Chen Zong nodded.
"Then I'll take my leave. I'll pick you up in a few days." After saying that, the deacon turned around and left. He had other things to do, so he couldn't stay here and accompany Chen Zong.
Chen Zong looked around. This was a natural cavern, a cavern where the Earth Fire gathered. There were many cone-shaped stones inside, either protruding from the ground or hanging down from above. The red light was blazing, and it looked like the inside of an ancient fire beast's mouth. Its fangs were crisscrossed and boundless.
The weapon refiner of the Ancient Mystic Society naturally had his own place. Chen Zong would not disturb him, nor did he want to disturb him.
After looking around, Chen Zong immediately strode toward the deepest part of the Earth Fire Cavern.
His purpose of entering the Earth Fire Cavern was to enter the deepest part and borrow the power of the Earth Fire to cultivate the Three Tribulations Sharpening.
The Three Tribulations Sharpening!
This secret technique was created by a Great Saint Realm expert in the late stage of the sword cultivator. It was to sharpen the Supreme Sword Intent.
The Three Tribulations Sharpening was divided into three tribulations. The cultivation condition was the half-step Sword Intent.
If one had already grasped the Sword Dao Intent and then cultivated it, it would be a little slow. It would be effective, but it would not be able to unleash its full potential. Moreover, the higher the level of the Dao Intent, the worse the cultivation effect would be.
Basically, it would be completely ineffective after the Third Revolution of the Dao Intent.
The half-step Sword Intent level was the most suitable level to cultivate the Three Tribulations Sharpening. At the very least, one had to master the first tribulation. The remaining two tribulations could wait until the half-step Sword Intent broke through to the true Sword Intent before cultivating.
It was also because the half-step Sword Intent could not withstand the tempering of the second tribulation, let alone the stronger third tribulation.
Three Tribulations Sharpening!
The three tribulations of this secret technique were the Earth Fire, Sky Wind, and Void Thunder.
The Earth Fire was the easiest to find, followed by the Sky Wind, and the Void Thunder was the most difficult to find.
As Chen Zong continued to go deeper, he could feel the temperature getting higher and higher. Gradually, even the power of the Purple Cloud Black Star Flame felt difficult to resist.
However, Chen Zong's physique was tyrannical, and he also had a high resistance to heat. Therefore, he could still withstand it.
He went deeper and deeper.
The red light was incomparably dazzling, shining in all directions. It was very dazzling, making it difficult for Chen Zong to look straight at it. It was as if his eyes were placed on fire to roast.
Hot, hot, hot!
The heat that invaded from the outside world seemed to be able to burn the earth and all living things, and seemed to be able to turn him into ashes.
Bearing the heat, Chen Zong walked forward and saw a small lake.
The small lake was only about 50 meters in radius. It was completely red and extremely dazzling, making it difficult for Chen Zong to open his eyes.
The Earth Fire Lake!
It was a lake formed by the accumulation of countless amounts of Earth Fire over countless years. The red liquid inside was not a real liquid. It was just that it had been condensed to an extremely high level, making it look like a viscous liquid.
It was like magma.
On the surface of the Earth Fire Lake, there was a layer of faint, almost transparent flames burning. Chen Zong could feel the terrifying power of the layer of flames, which was almost invisible. It was even more terrifying than his Purple Cloud Black Star Flame.
As the Mysterious Ancient Fire-refining Art was activated, the Purple Cloud Black Star Flame immediately circulated through every part of his body in a mysterious way. It greatly resisted the terrifying heat of the Earth Fire Lake, allowing Chen Zong to stay here for a longer period of time.
Then, he began to practice the Three Calamities Sharpening Secret Method.
Fortunately, Chen Zong could multitask. Otherwise, he could only practice one of the Mysterious Ancient Fire-refining Art or the Three Calamities Sharpening Secret Method.
The Half-step Sword Intent was a kind of invisible power, which was different from Spiritual Power and Half-Saint Power.
Chen Zong practiced the first of the Three Calamities Sharpening Secret Methods. Immediately, a trace of Earth Fire Qi was attracted and quickly entered Chen Zong's sea of consciousness. That was where the Half-step Sword Intent was located.
At the same time, the Half-step Sword Intent also condensed in the sea of consciousness.
The Earth Fire Qi was extremely pure and hot. As soon as it entered the sea of consciousness, Chen Zong felt that his sea of consciousness was being burned into ashes. It was extremely painful.
But Chen Zong had to endure it.
The Earth Fire Qi quickly spread and wrapped around the Half-step Sword Intent. It kept burning.
The pain became more and more intense and directly increased by several times. Chen Zong felt that he was going to faint, but he had to stay awake. Otherwise, not only would it not achieve the effect of refining, but it would also burn the Half-step Sword Intent. By then, he would not be able to comprehend the Sword Tao Meaning. Even his soul would be seriously injured.
This price was really amazing. But if he could practice the Three Calamities Sharpening Secret Method, he could cast the Supreme Sword Intent. The harvest would also be amazing.
Chen Zong was guessing whether the so-called Supreme Sword Intent referred to the Tao Meaning that surpassed the Advanced Level. If so, it would be really amazing.
No matter what, a secret method created by a Great Saint Realm expert at the late stage of Sword Cultivation was always extraordinary.
The Earth Fire Qi was guided one by one and gradually floated into the sea of consciousness. It wrapped around the Half-step Sword Intent and kept burning, as if it was calcining the sword embryo.
The high temperature made Chen Zong suffer great pain. It was a pain that directly attacked his soul. He felt that his soul was being roasted on a raging fire.
He endured it, controlled it, and kept refining it.
This was called the Fire Calamity.
Calamity!
This was a calamity. If he survived it, he could be reborn.
The Half-step Sword Intent seemed to be melting under the burning of the Earth Fire Qi. Chen Zong had to control it and keep condensing it. It was very difficult and exhausting.
Without a strong enough Spiritual Will, it was impossible to support it.
In other words, most cultivators could not practice a secret method like the Three Calamities Sharpening Secret Method successfully.
Gradually, Chen Zong endured it and adapted to the high temperature.
This was just the beginning. He absorbed more Earth Fire Qi into the sea of consciousness to refine the Half-step Sword Intent. Under this kind of refining, the Half-step Sword Intent seemed to become more solid.
Refine!
Refine!
Refine!
As more and more Earth Fire Qi entered the sea of consciousness, it kept condensing and gradually turned into a burning flame. The flame also kept absorbing the Earth Fire Qi from outside and became more and more powerful.
The first of the Three Calamities Sharpening Secret Methods, the Earth Fire Calamity, was to refine the Half-step Sword Intent with the Earth Fire.
However, cultivators could not release the Half-step Sword Intent and put it into the Earth Fire for a long time. They could only do the opposite and let the Earth Fire burn in their sea of consciousness.
How to ignite the Earth Fire in the sea of consciousness?
The Great Saint Realm Sword Practitioner suddenly had a strange idea. He absorbed the Earth Fire Qi one by one, starting from the tiniest one and accumulating it little by little so that his body could endure and adapt to it. In the end, when the Earth Fire Qi was enough, he could condense it into a ball of flame. After continuous absorption, it would become the real Earth Fire.
In this way, he could really refine the Half-step Sword Intent with the Earth Fire.
It took Chen Zong half a day to absorb enough Earth Fire Qi and form the Earth Fire in his sea of consciousness.
As soon as the Earth Fire appeared, Chen Zong felt that his sea of consciousness was about to be burned. Even his soul was trembling under the high temperature.
It was extremely terrifying. If he was careless, his sea of consciousness would be destroyed by the horrible Earth Fire and even his soul would be burned to ashes.
Exquisite control!
The Three Calamities Sharpening Secret Method was extremely exquisite. As long as Chen Zong kept operating it and Chen Zong's Spiritual Will could support it, he could resist the burning of the Earth Fire and continuously refine the Half-step Sword Intent.
It was like the process of forging an iron block into a sword embryo.
Time passed slowly. An Earth Fire kept burning in his sea of consciousness and calcined the Half-step Sword Intent. With the burning of the Earth Fire, the Half-step Sword Intent gradually became more solid.
This was the depth of the Earth Fire Cave. Most of the time, no one would come here, but occasionally there would be experts.
At this moment, an old man in a fiery red robe flew over. When he saw Chen Zong, he was shocked.
Because he felt the fluctuation of Chen Zong's aura.
High level Half-step Saint!
Since when did a high level Half-step Saint come here to practice? Wasn't he courting death?
The old man's fiery red hair was like a burning flame under the light of the Earth Fire Lake. He stared at Chen Zong, as if he wanted to see through Chen Zong.
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